“The smell is kind of like you’re standing behind a truck and it just turns on and the exhaust shoots right in your face,” resident James Kosior said.
“It’s like a horrible odor that goes through your nostrils and down into your throat,” Pat Picciano said.
“I get a severe headache. I can’t stay out. I have to go in the house ,” Irene Picciano added.

The smoke is produced when a massive printing press is in use at the KM Media Group, located in a nearby industrial park.

I could remember when I lived in Brooklyn, there would be times when a foul stench would linger in the air. The answer to that would always be, “oh, it must be Jersey!”

"Most likely it's coming from New Jersey due to the wind direction," the office told Passyunk Post. They point to the new natural gas power plant, LS Power, in West Deptford — on the other side of the Delaware from South Philadelphia — as a potential source.
The New Jersey Department of Environmental Protection said the state could be to blame, according to the Post.